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authorAlexandre Belloni <alexandre.belloni@free-electrons.com>2014-12-17 19:32:06 +0100
committerUlf Hansson <ulf.hansson@linaro.org>2014-12-29 14:49:28 +0100
commit1c2d26e379fc8d37d55befd8589c4c252186ee58 (patch)
treeb6ba8f25be8afaf93ae1cecb3f57ff6f56840ba5 /drivers
parentLinux 3.19-rc1 (diff)
downloadlinux-1c2d26e379fc8d37d55befd8589c4c252186ee58.tar.xz
linux-1c2d26e379fc8d37d55befd8589c4c252186ee58.zip
mmc: core: stop trying to switch width when only one bit is supported
mmc_select_bus_width() will try to switch to MMC_BUS_WIDTH_4 even if MMC_CAP_4_BIT_DATA and MMC_CAP_8_BIT_DATA are not set in host->caps. Return as soon as possible when those flags are not set Fixes: 577fb13199b1 (mmc: rework selection of bus speed mode) Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com> Cc: <stable@vger.kernel.org> # 3.17 Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/mmc/core/mmc.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c
index 02ad79229f65..7466ce098e60 100644
--- a/drivers/mmc/core/mmc.c
+++ b/drivers/mmc/core/mmc.c
@@ -886,7 +886,7 @@ static int mmc_select_bus_width(struct mmc_card *card)
unsigned idx, bus_width = 0;
int err = 0;
- if (!mmc_can_ext_csd(card) &&
+ if (!mmc_can_ext_csd(card) ||
!(host->caps & (MMC_CAP_4_BIT_DATA | MMC_CAP_8_BIT_DATA)))
return 0;